JP3654260B2 - Steam passage structure of rice cooker - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a steam passage structure of a rice cooker. To make It is related.
[0002]
[Prior art]
In a rice cooker that cooks rice by heating or generating heat in a pot housed in a container, the steam generated during cooking is evacuated to the outside through the lid, regardless of the heat source. Neba has conventionally been devised to return to the pot while separating and storing in the middle.
[0003]
FIG. 4 shows an example of a steam passage structure according to a proposal recently made by the present applicant. Describing this, a steam passage b having a steam outlet m for allowing steam to escape to the outside is provided in a lid a supported so as to be opened and closed by a part of a container (not shown). The steam passage b includes a lid-side steam passage c formed by the lid a and a lower steam passage d connected to the lid-side steam passage c from below. The lower steam passage d is formed so that the upper member e and the lower member f are detachably fitted to each other to form a lower steam passage d having an extended portion d1 that is extended from the lid side steam passage c.
[0004]
The lower steam passage d has a toe return port g at the center of the bottom portion for returning the rice cake into the pan, and has a connection port h connected to be detachable from the lid side steam passage c at the upper center. In a state where the connection port h is connected to the lid-side steam passage c, the shoulder portion i of the expansion portion d1 is close to the inner surface of the lid a to form an annular gap j, and a plurality of portions formed on the upper surface of the expansion portion d1 The steam inlet port k introduces the steam in the pan into the extended portion d1 of the lower steam passage d through the gap j.
[0005]
While the steam introduced into the expansion part d1 is gas-liquid separated by the throttling effect at the steam inlet k and the expansion at the expansion part d1, a heavy screw falls to the bottom of the expansion part d1 by its own weight, While the steam spreads lightly in the extension part d1, it rises from the lower steam passage d through the connection port h to the lid-side steam passage c and escapes to the outside from the upper steam outlet m.
[0006]
By the way, the water level at the time of cooking rice is conventionally performed based on the scale given to the pan and many years of experience. However, sometimes water becomes excessive. For example, in old rice and winter, the water absorption of rice is dull, and if the amount of rice and water is a normal ratio, the water tends to be excessive. If the water is excessive, the amount of steam generated during cooking will increase, and the momentum when going outside will increase. In this case, rice balls are likely to flow out along with the steam, easily accumulate in the steam passage b, and easily blow out to the outside.
[0007]
In the conventional steam passage structure, the steam introduced into the extension portion d1 of the lower steam passage d is less likely to enter the extension portion d1 due to the constriction action at the steam inlet k in the shoulder portion, and the extension portion. The steam and the steam are separated from each other by the action of expansion and collision when flowing in from the top of d1 toward the bottom wall and blown in, and the centrifugal action when turning U-turns upward. Is discharged from the steam outlet m through the lid-side steam passage c. Thereby, it is easy to prevent the rice balls from being blown out together with the steam.
[0008]
Further, even if the steam passage b remains or adheres, the lid a is removed from the container, the lower steam passage d is removed from the lid-side steam passage c, and the upper and lower members e of the removed lower steam passage d are removed. By separating f, each can be opened widely and easily cleaned to every corner.
[0009]
[Problems to be solved by the invention]
However, in the above proposal, the steam inlet k is provided in the shoulder portion of the expansion part d1, so that the lower steam passage d having this can be opened for easy cleaning so that it can be divided into two. I must. For this reason, the number of parts increases and the number of man-hours for separation and assembling each time cleaning is increased, which is inconvenient to use and handle.
[0010]
The purpose of the present invention is to reduce the number of parts, separation and assembly processes without impairing the blowout prevention function, and to make the steam passage structure of a rice cooker inexpensive and convenient to use and handle. Make It is to provide.
[0011]
[Means for Solving the Problems]
The steam path structure of the rice cooker according to the present invention is a rice cooker that escapes steam generated during cooking in the pot to the outside through the lid, and returns the rice accompanying the steam to the pot while separating and storing it. In the steam passage structure, a first passage that leads from the lower portion having a return port for returning the stick to the inside of the pan to the upper portion having a steam outlet for releasing the steam to the outside, and provided around the outer periphery of the first passage With the second passage The first and second steam inlets provided on the peripheral walls of the first and second passages Prepared, These first and second steam inlets are located almost on opposite sides, and the steam flowing in from the second steam inlet is divided into left and right along the second passage and reaches the opposite side, and reaches the opposite side from the first steam inlet to the first passage. To flow into This is the main feature.
[0012]
In such a configuration, after the steam generated in the pan flows from the second steam inlet of the second passage into the second passage, the steam flows from the first steam inlet of the first passage into the first passage, and the upper part thereof. Since the steam is discharged from the steam outlet to the outside of the lid, it is possible to prevent the inside of the pan from being raised abnormally.
[0013]
At this time, the steam flowing into the second passage from the second steam inlet has a circumferential position of the second steam inlet with respect to the first steam inlet. In the direction Due to the difference, it does not pass through the first steam inlet, but it collides with the outer surface of the first passage and undergoes gas-liquid separation between the rice and the steam, and the heavy one falls to the bottom of the second passage. Although light steam is bent along the second passage, Specifically, at least on the opposite side divided into left and right along the second passage Proceed until it reaches the first steam inlet and flows into the first passage. Almost half a lap Centrifugal action is caused by the fact that the path is bent by a distance, and centrifugal separation of the steam and the steam is performed, and the steam leaves the separated heavy twist in the second passage and from the first steam inlet to the first passage. The gas flows into the first passage and collides with the inner wall of the first passage facing the first steam inlet, so that further gas-liquid separation occurs, and the steam rises up the first passage leaving a separated heavy bed at the bottom of the first passage. It reaches the upper steam outlet and is discharged to the outside.
[0014]
In this way, the steam released to the outside is repeatedly subjected to gas-liquid separation, and the first and second passages are separated well by the first and second passages and are trapped in the lower part of the first passage. For example, even when water is excessive and steam is released in a large amount, the gas-liquid separation performance is not insufficient, and the rice bowl is blown out to the outside and of course flows out to the lid side steam passage. And is easy to keep clean with a simple wiping level, so it is suitable for rice cookers that cannot be removed or have electric equipment and are not suitable for round washing. The first and second passages are both straight and simple, and are sufficient for separation and can be manufactured at low cost.
[0015]
In addition, the rice cake separated in the first passage is left as it is, and the rice cake separated in the second passage flows into the first passage through the money inlet, and returns to the inside of the pot with its own weight through the rice return outlet there. Therefore, it is possible to prevent the separated first and second passages from collecting and blocking the first and second passages and being blown out by steam.
[0016]
Moreover, the steam passage structure having a double structure with the first and second passages is only a two-part structure that separates the integrated lower separation part from the upper side, and any of the division sides can be opened at the division part. Since the number of parts for opening the first and second passages and the man-hours for separation and assembly are reduced, it is inexpensive and convenient for use and handling. It does not reach the lid side steam passage and is easy to keep clean with simple wiping. This is particularly suitable in the case where the lid cannot be separated from the body or is equipped with electrical equipment and is not suitable for round washing.
[0025]
Further objects and features of the present invention will become apparent from the following detailed description and drawings. Each feature of the present invention can be used alone or in combination in various combinations as much as possible.
[0026]
【Example】
Hereinafter, several embodiments of the present invention will be described in detail with reference to FIGS. 1 to 3 for understanding of the present invention.
[0027]
Although a present Example is an example in the case of the rice cooker which performs electromagnetic induction heating, it is not restricted to this. In short, as shown in FIG. 1, rice is cooked in a pot 2 housed in a container 1, and steam generated during cooking is released to the outside while separating and removing rice balls through a steam passage 4 provided in the lid 3. The present invention is effective when applied to a general steam passage structure of a vessel, and all of them belong to the category of the present invention.
[0028]
The container 1 has a hollow structure made of synthetic resin and accommodates the pan 2 so that the pan 2 can be attached and detached from the opening 1a at the upper end. A bottom inner work coil 6 and a bottom outer work coil 7 which are provided around the inner wall 5 forming the pot accommodating portion of the container body 2 and are opposed to the center portion and the outer peripheral portion of the bottom portion of the pot 2, and the body portion of the pot 2. A lid 3 that includes a body heater 8 and opens and closes the opening 1a of the container 1 and the opening 2a of the pot 2 so that the bearing 1b provided at the rear of the shoulder of the container 1 can be opened and closed by a hinge pin 13. It is connected. In connection with the fact that the lid 3 cannot be attached and detached, a lid heater 15 is provided on a metal inner lid 14 provided in a range where the opening 2 a of the pan 2 is closed inside the lid 3. But you may provide the lid | cover 3 so that attachment or detachment to the container 1 is possible. The inner lid 14 may be detachably attached to the inside of the lid 3 or may be provided independently. In these cases, a shoulder heater (not shown) may be provided on the shoulder portion of the container 1 so that the heat is transmitted to the inner lid 14 so that heating from the lid 3 side can be performed.
[0029]
An operation board 9 having operation switches and display lamps is provided inside an operation panel 11 provided at the front of the body 1, and inside the operation board 9, a bottom inner work coil 6 and a bottom outer work are provided. The control board 16 which equips the coil 7, the trunk | drum heater 8, and the lid | cover heater 15 with the rice cooking process, the amount of rice cooking, and the various drive states according to the difference between rice cooking and heat retention, and the power supply circuit of each part is equipped. Is provided. However, these various circuits relating to operation, display, drive control, and power supply may be basically divided and arranged in any manner. The driving circuit for the bottom inner work coil 6 and the bottom outer work coil 7 is provided with elements and electrical elements that generate heat such as IGBTs and coils, and the bottom inner work coil 6 and the bottom outer work coil 7 themselves also generate heat. Is provided with a fan 17 for appropriately cooling the air.
[0030]
The lid 3 is biased in the opening direction by the bias of the spring 21. A braking mechanism for braking the opening operation by the biasing of the spring 21 is provided as necessary, and a lock claw 23 biased by the spring 22 is provided to lock the lid 3 in a closed position so that the lid 3 does not open freely. . Since the lock claw 23 unlocks the lid 3 by rotating counterclockwise around the shaft 24 against the spring 22, the lid 3 is automatically opened by the bias of the spring 21.
[0031]
Here, steam generated during cooking in the pan 2 is released to the outside through the steam passage 4 of the lid 3, and the rice balls accompanying the steam are separated and returned to the pan 2 while being stored. In this embodiment, as shown in FIG. 1, a first passage 33 leading to an upper portion having a steam outlet 32 for releasing steam from the lower portion having a toe return port 31 for returning the gob into the pot 2, and this And a second passage 34 provided around the first passage 33. In addition to this, it is provided on the inner and outer cylindrical walls 40a2 and 40a3 that are the peripheral walls of the first and second passages 33 and 34, communicates with each other in the second passage 34, and has different positions in the circumferential direction and the height direction. The first and second steam inlets 35 and 36, and the torsion inlet 37 provided at the lower portion of the inner cylindrical wall 40 a 2 of the first passage 33 to allow the screw to flow into the first passage 33 from the second passage 34. The lower separation part 40a that can be separated from the upper part integrally with each other is provided below the first and second passages.
[0032]
Such a steam passage 4 allows the steam generated in the pan 2 to escape to the outside of the lid 3, while the steam 41 generated in the pan 2 is indicated by a dashed arrow in FIG. After flowing into the second passage from the inflow port 36, it flows into the first passage 33 from the first steam inflow port 35 of the first passage 33 and discharges it from the upper steam outlet 32 to the outside of the lid 3. Thereby, it is possible to prevent the inside of the pan 2 from being abnormally boosted.
[0033]
At this time, the position of the second steam inlet 36 in the steam 41 flowing into the second passage 34 from the second steam inlet 36 is different from the first steam inlet 35 in the circumferential direction or the height direction. Thus, the first steam inlet 35 is not passed through. That is, the steam 41 flowing into the second passage 34 from the second steam inlet 36 will collide with the outer wall surface of the first passage 33, and the gas 42 is subjected to gas-liquid separation due to the collision action. As shown by the solid arrow, the heavy screw 42 falls and is received at the bottom of the second passage 34, and the light steam 41 proceeds to the first steam inlet 35 while being bent along the second passage 34. Centrifugal action resulting from the course being bent by the distance traveled by the steam 41 causes the centrifuge 42 and the steam 41 to be separated, and the steam 41 passes the separated heavy crust 42 into the second passage 34. The air flows from the first steam inlet 35 into the first passage 33. The steam 41 that has flowed into the first passage 33 is also subjected to further gas-liquid separation if there is any remaining 42 if it collides with the inner wall surface of the first passage 33 that faces the first steam inlet 35. 41 leaves the separated heavy screw 42 at the bottom of the first passage 33, moves up the first passage 33, reaches the upper steam outlet 32, and is discharged to the outside.
[0034]
In this manner, the vapor 41 released to the outside is repeatedly subjected to gas-liquid separation, and the beef 42 that is about to flow out accompanying the vapor 41 is well separated in the first and second passages 33 and 34, and the first Since it is trapped in the lower part of one passage 33, for example, in a height range suitable for approximately 37 parts of the inflow port, gas-liquid separation performance is insufficient even when water is excessive and steam is discharged in a large amount. Without letting it go, it will flow out to the lid-side steam passage 40b, that is, to the upper steam passage portion remaining on the lid 3 side when the lower separation portion 40a is removed. Both the first and second passages have a simple straight structure and are sufficient for separation and can be manufactured at low cost. However, in some cases, the first and second passages 33 and 34 may not be provided in a straight line, and may be a bent route or a detour route, which further increases the chance of separation if the steam passage is lengthened or twisted. You can make it.
[0035]
In addition, the tow 42 separated by the first passage 33 is left as it is, and the tow 42 separated by the second passage 34 flows into the first passage 33 through the toy inlet 37, and there is a return return port 31 there. Return to the pot 2 with its own weight. As a result, it is possible to prevent the first and second passages 33 and 34 from being separated and the first and second passages 33 and 34 from being blocked and blown out by the steam 41. it can.
[0036]
Moreover, the structure of the steam passage 4 having a double structure by the first and second passages 33 and 34 is only a two-part structure that separates the integrated lower separation portion 40a from the upper side, and any of the division sides is divided. Since the number of parts for separating the first and second passages 33 and 34 and the man-hours for separation and assembly are reduced, it is inexpensive and convenient to use and handle. . As described above, since 42 does not reach the lid-side steam passage 40b, it is easy to keep clean with a simple wiping level. This is particularly suitable in the case where the lid 3 cannot be separated from the container 1 or is equipped with electrical equipment and is not suitable for round washing as in this example.
[0037]
As shown in FIGS. 1 to 3, the first and second steam inlets 35 and 36 are located on substantially opposite sides. As a result, the steam that flows into the second passage 34 from the second steam inlet 36 flows into the first passage 33 from the first steam inlet 35, but the steam 41 is divided into left and right along the second passage 34. Since it is necessary to reach at least the opposite side, it is possible to perform the centrifugal separation for each of the left and right half circles, and the separation effect of 42 is enhanced if the amount is increased accordingly. At this time, if the first steam inlet 35 is positioned higher than the second steam inlet 36, the steam 41 divided into the left and right is strongly collided as shown in FIG. If it goes to 1 vapor | steam inflow port 35 and the amount which collides strongly, the separation effect of 42 will further increase.
[0038]
As shown in FIG. 2, the second steam inlet 36 is located at a predetermined height A from the bottom of the second passage 34. The first steam inlet 35 has a vertically long shape that is continuous upward with respect to the generally inlet 37 provided upward from the bottom surface of the second passage 34. As a result, the second steam inlet 36 regulates the height of the inflow of the steam 41 into the second passage 34 from the bottom thereof to a predetermined height A and directs it toward the first steam inlet 35. Therefore, it is possible to prevent the blow-off of the screw 42 separated from the steam 41 in the second passage 34 and accumulating at the bottom or accompanying the steam 41 flowing into the first passage 33. Further, a toy inlet 37 provided upward from the bottom surface of the second passage 34 allows the toe 42 to flow from the second passage 34 to the first passage 33 without barriers and without difficulty. The vertically long first steam inlet 35 that is continuous upward from the neck inlet 37 is formed as one inlet together with the neck inlet 37, so that the structure is simpler than the case of being provided individually, and the vertically long Thus, the steam 41 flowing into the second passage 34 at a predetermined height A from the bottom of the second passage 34 flows into the first passage 33 from the second passage 34 at the lower portion of the inflow port 37. It flows into the first passage 33 at an upper position free from the flow of the rice 42. Thereby, it is possible to prevent the separated rice ball 42 from being accompanied by the steam 41 flowing into the first passage 33 and discharged toward the upper steam outlet 32. In this example, the bottoms of the first and second passages 33 and 34 are set at the same level, but if the bottom of the first passage 33 is lower than the bottom of the second passage 34, not only the barrier free, The bottom 42 of the second passage can be made to flow more actively into the bottom side of the first passage 33, and the backflow of the tongue 42 from the first passage 33 to the second passage 34 can be prevented. The return action of the screw 42 into the pot 2 is increased.
[0039]
As shown in FIGS. 2 and 3, the second steam inlet 36 is horizontally long, and for example, the width C is several times larger than the height B. In this way, the inflowing steam is caused to flow into the inflowing steam 42 by the throttling action on the steam 41 flowing into the second passage 34 and the expansion action when flowing into the second passage 34 as much as the required opening area is obtained in a narrow shape. Easy to separate from 41. Moreover, since the required height A from the bottom part of the 2nd channel | path 34 can be ensured in a low position, the required height of the 2nd channel | path 34 is restrained and the bulkiness of the up-down direction of the lid | cover 3 can be restrained.
[0040]
As shown in FIGS. 1 and 2, the first passage 33 includes a lid-side steam passage 40b provided on the lid 3 side, and an inner cylinder wall 40a2 of the steam passage member 40a1 connected to the lid-side steam passage 40b from below. It is composed. The second passage 34 is formed by an outer cylindrical wall 40a3 formed integrally with the outer periphery of the inner cylindrical wall 40a2 of the steam passage member 40a1 in contact with the inner side surface of the lid 3 to form the lower separation portion 40a. As described above, one lid-side steam passage 40b provided in the lid 3, the inner cylinder wall 40a2 connected so as to be separable from the lid-side steam passage 40b, and the lower separation portion 40a having the outer cylinder wall 40a3 around the outer cylinder wall 40a3. Since it is composed of the steam passage member 40a1, the lid 3 side has a simple structure in which the second passage portion is omitted, so that it can be manufactured at a low cost, and the lower separation portion 40a has a lower half portion of the first passage 33. However, since a simple double wall structure having inner and outer cylindrical walls 40a2 and 40a3 may be used, it can be manufactured at low cost. The steam passage member 40a1 has a lower side of the steam passage 4 so to speak. It has a removable steam cap to make up.
[0041]
As shown in FIG. 2, the height D of the inner cylinder wall 40a2 is higher than the height E of the outer cylinder wall 40a3, and the upper end of the inner cylinder wall 40a2 is supported so as to be detachable from a part of the lid-side steam passage 40b. doing. As a result, the lid-side steam passage 40b, which tends to have a complicated configuration, is shortened only by the dimensional condition in which the inner cylindrical wall 40a2 is higher than the outer cylindrical wall 40a3, which should have at least the required height A of the second passage 34. And securing the connection allowance S with the shortened lid-side steam passage 40b by using a portion higher than the outer cylinder wall 40a3 while making the structure on the lid 3 side simpler, bulkier and easier to clean. Can do.
[0042]
The first steam inlet 35 is higher than the second passage 34 by F. As a result, the first steam inlet 35 is positioned higher than the second steam inlet 36 provided in the second passage 34. Therefore, if the first steam inlet 35 flows into the second passage 34 from the second steam inlet 36, the separation of 42 occurs. The flow of the steam 41 flowing into the first passage 33 through the first steam inlet 35 and reaching the upper steam outlet 32 without disturbing the flow of the first and second passages 33, 34. Since it makes it easier to be discharged | emitted outside from the top 42 in the bottom part, the blowing prevention effect of the top 42 further increases.
[0043]
Further, the tap return port 31 is opened at the bottom of the first passage 33, and a valve 43 is provided on the lower surface thereof so that the tap 42 is pushed open by its own weight and flows down into the pan 2. As a result, the stomach 42 separated from the steam 41 and gathering at the bottom of the first passage 33 pushes the valve 43 open and returns to the inside of the pan 2, while the steam 41 in the pan 2 passes through the first return port 31. Even if the valve 43 is about to flow directly into the passage 33, the valve 43 is pressed against the lower surface of the return port 31 to close it, thereby preventing the direct flow. It can be prevented that it is discharged to the outside or discharged to the outside while blowing the tongue 42 at the bottom of the first passage 33.
[0044]
More specifically, the lid 3 has a hollow structure in which an upper plate 51 and a lower plate 52 made of synthetic resin are integrated by screwing or the like as shown in FIG. A metal inner lid 14 facing and fitting to the opening 2a of the pan 2 is fitted and attached. Especially, heat is uniformly applied from above by the lid heater 15 during heat insulation, so that the upper part of the rice drops in temperature and causes condensation. To prevent things from happening. A heat insulating material 53 is built in the upper part of the inner lid 14 so as to prevent heat from escaping upward. A cylindrical wall 40b1 forming a lid-side steam passage 40b is integrally formed downward on the upper plate 51, and the lower end thereof seals between the hole edge of the hole 54 through which the steam passage 4 of the lower plate 52 passes and A seal member 55 is fitted to support the upper end of the cylindrical wall 40b1 so that the upper end of the cylindrical wall 40b1 can be attached to and detached from the lid side steam passage 40b. A heat insulating material 61 is also provided on the outer periphery of the body heater 8 to prevent escape of heat to the periphery and thermal influence. A temperature sensor 62 that detects the temperature by contacting the bottom of the pot 2 is provided at the center of the inner wall 5 of the vessel body 1.
[0045]
The seal member 55 is made of, for example, silicon rubber, and a support edge 55a is formed at a portion where a smooth upper and lower inclined surface forms a mountain shape and abuts inward from the upper and lower ends toward the middle portion on the inner periphery. A flange-like convex portion 56 integrally formed on the outer periphery of the upper end portion of the inner cylindrical wall 40a2 of the steam passage member 40a1 is elastically passed from the lower side to the support edge 55a so that the inner cylindrical wall 40a2 and the lid-side steam passage are formed. 40b is fitted with the connection allowance S and sealed between each other by the seal member 55, so that the steam 41 and the like are not leaked, and the convex portion 56 of the inner cylindrical wall 40a2 is the supporting edge of the seal member 55. The steam passage member 40a1 is supported in the connected state by being hooked on the upper side of 55a, and when the steam passage member 40a1 is pulled downward, the support is released by elastic deformation of the seal member 55, so that it can be detached and separated. The convex portions 56 may be annular, but can be set to two or more discontinuous numbers as shown in the figure. If the convex portion 56 is provided above the first steam inlet 35 of the inner cylindrical wall 40a2, there is no problem.
[0046]
In the connected state of the steam passage member 40a1, the upper end of the outer cylindrical wall 40a3 abuts on the lower surface formed by the inner lid 14 of the lid 3, and a second passage 34 is formed therebetween, and the upper end of the outer cylindrical wall 40a3 is cut away. The second steam inlet 36 formed in this manner is opened to a predetermined size with the inner lid 14. Further, the upper end of the outer cylindrical wall 40a3 is in contact with the lower surface of the lid 3, and accordingly in the drawing, the inclined portion 14a formed by the inner lid 14, and the outer cylindrical wall 40a3 is elastically actuated by the inclined portion 14a. Even if the height of the upper end fluctuates due to component dimensional errors, position errors due to assembly, etc., it can be absorbed to some extent by itself or with the help of the elasticity of the seal member 55. In addition, since the inclined portion 14a is oriented so as to surround the upper end portion of the outer cylindrical wall 40a3 from the outside, the contact portion between the outer cylindrical wall 40a3 and the lower surface of the lid 3 is prevented from appearing externally. It has become.
[0047]
As shown in FIGS. 1 and 2, a part of the return port 31 is continuous with the inflow port 37 and the first steam inflow port 35, and the first steam inflow port 35 is used for mold release during molding. It has a slightly tapered shape toward the upper end of. The base width T of the inlet 37 is substantially the same as the width C of the second steam inlet 36 and is slightly smaller than the upper end width T of the first steam inlet 35. The opening area of the first steam inlet 35 is larger than the opening area of the second steam inlet 36. Thereby, the resistance when the steam 41 flows into the first passage 33 from the first steam inlet 35 becomes larger than the resistance when the steam 41 flows into the second passage 34 from the second steam inlet 36. It is possible to prevent the pressure of the steam 41 from increasing in the first and second passages, and the area ratio is preferably about 5 times. In this example, such an area relationship is satisfied because the first steam inlet 35 is vertically long. However, although it can be satisfied with other configurations, the smaller the width of the first and second steam inlets 35, 36, the more the steam 41 reaching the first steam inlet 35 from the second steam inlet 36. Since the turning distance becomes large, it is advantageous for separation of 42. Each of the first and second passages 33 and 34 and the toe inlet 37 may be divided into a plurality of holes and notches, or conversely, the number of return ports 31 may be less than the four shown. Or even one.
[0048]
In addition, setting the diameter G of the steam passage member 40a1 to about one quarter of the diameter H of the opening 2a of the pan 2 is suitable for releasing the steam 41 to the outside appropriately without impairing gas-liquid separation. . Furthermore, the diameter J of the inner cylindrical wall 40a2 and the width K of the second passage 34 are approximately the same size, which is suitable for the discharge of the steam 41 and the separation of the rough 42.
[0049]
A flange 57 is provided on the outer periphery of the lower end of the steam passage member 40a1 to serve as a finger hook portion when the steam passage member 40a1 is pulled downward. Further, a seal member 58 between the mouth edge of the pan 2 is sandwiched between the inner lid 14 and the lower plate 52 so that the pan 2 can be sealed except for the steam passage 4. The valve 43 of the return return port 31 is a thin sheet formed of silicon rubber or the like, and an attachment projection 43a integrally formed in the center cannot be forced into the support hole 59 provided in the central portion of the return return port 31 from below. It is fitted and attached.
[0050]
【The invention's effect】
According to the present invention, when the steam generated in the pan is released outside the lid, 2 No. from steam inlet 2 The steam flowing into the passage is located around the second steam inlet with respect to the first steam inlet. In the direction No. by being different 1 Although it does not pass through the steam inlet, it collides with the outer surface of the first passage and undergoes gas-liquid separation between the rice and the steam, and the heavy rice cake falls to the bottom of the second passage and is received. Is bent along the second passage Specifically, at least on the opposite side divided into left and right along the second passage Proceed until it reaches the first steam inlet and flows into the first passage. Almost half a lap Centrifugal action is caused by the fact that the path is bent by a distance, and centrifugal separation of the steam and the steam is performed, and the steam leaves the separated heavy twist in the second passage and from the first steam inlet to the first passage. The gas flows into the first passage and collides with the inner wall of the first passage facing the first steam inlet, so that further gas-liquid separation occurs, and the steam rises up the first passage leaving a separated heavy bed at the bottom of the first passage. It reaches the upper steam outlet and is discharged to the outside.
[0051]
In this way, the steam released to the outside is repeatedly subjected to gas-liquid separation, and the first and second passages are separated well by the first and second passages and are trapped in the lower part of the first passage. For example, even when water is excessive and steam is released in a large amount, the gas-liquid separation performance is not insufficient, and the rice bowl is blown out to the outside and of course flows out to the lid side steam passage. And is easy to keep clean with a simple wiping level, so it is suitable for rice cookers that cannot be removed or have electric equipment and are not suitable for round washing. The first and second passages are both straight and simple, and are sufficient for separation and can be manufactured at low cost.
[0052]
In addition, the rice cake separated in the first passage is left as it is, and the rice cake separated in the second passage flows into the first passage through the money inlet, and returns to the inside of the pot with its own weight through the rice return outlet there. Therefore, it is possible to prevent the separated first and second passages from collecting and blocking the first and second passages and being blown out by steam.
[0053]
Moreover, the steam passage structure having a double structure with the first and second passages is only a two-part structure that separates the integrated lower separation part from the upper side, and any of the division sides can be opened at the division part. Since the number of parts for opening the first and second passages and the man-hours for separation and assembly are reduced, it is inexpensive and convenient for use and handling. It does not reach the lid side steam passage and is easy to keep clean with simple wiping. This is particularly suitable in the case where the lid cannot be separated from the body or is equipped with electrical equipment and is not suitable for round washing.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a rice cooker having a steam passage structure according to one embodiment of the present invention.
FIG. 2 is a cross-sectional view of a steam passage structure portion of the rice cooker of FIG.
3 is a plan view showing a steam passage member as a lower separation portion in the steam passage structure portion of FIG. 2; FIG.
FIG. 4 is a cross-sectional view of a main part showing a steam passage structure of a rice cooker as an example of the previous proposal.
[Explanation of symbols]
1 body
2 hot pot
3 lid
4 Steam passage
31 Please return
32 Steam outlet
33 1st passage
34 Second passage
35 First steam inlet
36 Second steam inlet
37 Oneba Inlet
40a Lower separation part
40a1 Steam passage member
40a2 Inner cylinder wall
40a3 outer wall
40b Lid side steam passage
41 steam
42
43 Valve
55a Support edge
56 Convex

Claims (1)

In the steam passage structure of the rice cooker that escapes steam generated during rice cooking in the pan to the outside through the lid, and returns to the pan while separating and storing the rice balls accompanying the steam,
A first passage leading to an upper portion having a steam outlet through which steam is released from a lower portion having a tongue return port for returning the gob into the pan, a second passage provided around the first passage, and these First and second steam inlets provided on the peripheral walls of the first and second passages, and the first and second steam inlets are located on substantially opposite sides, and the steam flowing in from the second steam inlet The steam path structure of the rice cooker is characterized in that is divided into right and left along the second path and reaches the opposite side and flows into the first path from the first steam inlet .

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